Nick goes green to celebrate Earth Day

As a major lead-up to Tuesday's Earth Day celebration, Nickelodeon has been rolling out "The Big Green Help," a public-service campaign to educate children about how they can positively affect the environment. "We want to go beyond the tip of the day and really explain the issue," said Jean Margaret Smith, a senior vice president of public affairs for the network. "We want kids to be thought-leaders at home and in the community."